/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.beam.runners.core;

import org.apache.beam.sdk.transforms.DoFn.BundleFinalizer;

/**
 * The context in which a specific step is executing, including access to state and timers.
 *
 * <p>This interface exists as the API between a runner and the support code, but is not user
 * facing.
 *
 * <p>These will often be scoped to a particular step and key, though it is not required.
 */
public interface StepContext {

  StateInternals stateInternals();

  TimerInternals timerInternals();

  default BundleFinalizer bundleFinalizer() {
    throw new UnsupportedOperationException("BundleFinalizer is unsupported.");
  }
}
